This server application turns any Javascript app into an IMS LTI 1.1 tool provider. Edu Apps has a good description of how LTI works.

The benefits of serving your Javascript app as an LTI Tool instead of a simple page are:

• Your Javascript app will know the identity of the learner, passed from the LTI Tool Consumer
• Your app can send a result back to the LTI Tool Consumer at the end with the learner's percentage grade
• You can launch it from an LTI Tool Consumer such as Coursera

This web app provides some additional benefits:

• Your configure your web page content using forms instead of file uploads
• Your Javascript app is provided functions to log in a common format
• You can download the log data from this web application

If you want to use this app as is, you can simply click below to spin up a web server using your free Heroku account.

To get deeper in, you may want to fork this repo and start poking around. It's a simple Ruby on Rails application.